Yes, doctors almost have a mantra about this: if you are having to use lots of insulin to get and keep BSLs down then hypos are more likely.
But see Pediatrics March 2018 Management of Type One Diabetes On Very Low Carbohydrate Diets authors Lennerz, Ludwig et al you can see average HBA1C around 5.6%, low BSL variability and very low hypo rate.
As the author of the Swedish study notes, the statistics are not as clear when looking at the lower HBA1C levels. How many TIDs did the study find say, at HBA1C of 5.5 % or lower? How can you compare the HBAIC and complication rate them if there were not many sub 5.5%?
Is this study really just proving the obvious? If you use a usual diabetes diet and try to achieve low HBA1Cs you are at increased risk of hypos?
The ADA would applaud as they have set upper limits for recommended acceptable BSLs for TIDs of 10 mmol/l. Why? Anecdotally US physicians are worried they will get sued if a patient of theirs suffers from a hypo, never mind that the recommended BSL ranges may lead to their patients being at risk of diabetes-related complications later on when it may be more difficult to prove what caused the complications to occur.